Bun.build fails with Threlte

[pekeler]

What version of Bun is running?

1.2.5+013fdddc6

What platform is your computer?

Darwin 24.3.0 arm64 arm

What steps can reproduce the bug?

Bun.build can't resolve Threlte, even though it was added and installed properly.

1. set up a simple Svelte project as described here feat: support Svelte in bundler and dev server #17735
2. bun add three @threlte/core
3. edit App.svelte and add import { Canvas } from "@threlte/core"; to the script part, and <Canvas/> to the html part
4. (optionally confirm Threlte has been installed to node_modules)
5. bun run build.ts

What is the expected behavior?

Using other npm packages such as lodash seems to work fine, so the expectation is that Threlte also just works.

What do you see instead?

4 | import { Canvas } from "@threlte/core";
                           ^
error: Could not resolve: "@threlte/core". Maybe you need to "bun install"?
    at /private/tmp/svelte-bun-test/src/App.svelte:4:24

Bun v1.2.5 (macOS arm64)

Additional information

Threlte is a Svelte wrapper for Three.js, so it shouldn't require any special build support. It works as expected when using vite as bundler.

[pekeler]

repo: https://github.com/pekeler/svelte-bun-test